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https://issues.apache.org/jira/browse/FLINK-3174?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15087381#comment-15087381
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ASF GitHub Bot commented on FLINK-3174:
---------------------------------------
Github user rmetzger commented on a diff in the pull request:
https://github.com/apache/flink/pull/1460#discussion_r49074918
--- Diff:
flink-streaming-java/src/test/java/org/apache/flink/streaming/runtime/operators/windowing/WindowOperatorTest.java
---
@@ -438,7 +617,7 @@ public void close() throws Exception {
}
@SuppressWarnings("unchecked")
- private static class ResultSortComparator implements Comparator<Object>
{
+ private static class Tuple2ResultSortComparator implements
Comparator<Object> {
--- End diff --
this is also a duplicate with `NonKeyedWindowOperatorTest` according to
IntelliJ
> Add merging WindowAssigner
> --------------------------
>
> Key: FLINK-3174
> URL: https://issues.apache.org/jira/browse/FLINK-3174
> Project: Flink
> Issue Type: Improvement
> Components: Streaming
> Reporter: Aljoscha Krettek
> Assignee: Aljoscha Krettek
> Fix For: 1.0.0
>
>
> We should add the possibility for WindowAssigners to merge windows. This will
> enable Session windowing support, similar to how Google Cloud Dataflow
> supports.
> For session windows, each element would initially be assigned to its own
> window. When triggering we check the windows and see if any can be merged.
> This way, elements with overlapping session windows merge into one session.
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